Ternary data communication using multiple polarizations

Details Ternary data communication using multiple polarizations Ternary data communication using multiple polarizations

1992-04-02

1994-03-29

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359181, 359189, H04B 1004, H04B 1006

Patent

active

052990478

ABSTRACT:
Higher information rates are achieved in lightwave communication systems by using optical signals of different polarizations to represent data as ternary digits. Each ternary digit assumes a value, for example, of either zero, logic 1 (e.g., an amplitude of one unit) on a first polarization, or logic 1 on a second polarization. The ternary digits are transmitted to a receiver through a single optical fiber by modulating the optical signals in time with one of these two polarizations or zero. The receiver determines the value of each ternary digit by determining that the received optical signal has a value of either zero or logic one on a particular one of the two polarizations.

REFERENCES:
patent: 5023950 (1991-06-01), Tsushima
patent: 5184243 (1993-02-01), Henmi
S. G. Evangelides, Jr. et al., "Polarization Multiplexing With Solitons", Jour. of Lightwave Technology, vol. 10, No. 1, Jan. 1992, pp. 28-35.
R. Cross et al., "Polarization Measurement Goes Automatic", Lasers & Optronics, Nov. 1991, pp. 25-26.
L. Seto et al., "Coherent Optical Polarization-Shift-Keying (POLSK) Homodyne System Using Phase-Diversity Recievers," IEEE Global Telecomm. Conference, Phoenix, Arizona, Dec. 2-5, 1991, pp. 1601-1605.
R. Calvani et al., "An Experiment of Optical Heterodyne Transmission With Polarization Modulation At 140 Mbit/s Bitrate and 1550 nm Wavelength", IEEE Global Telecommunications Conference, Phoenix, Arizona, Dec. 2-5, 1991, pp. 1587-1591.

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